/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.cli.commands.sql.help;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import org.jline.reader.Candidate;
import org.jline.reader.Completer;
import org.jline.reader.LineReader;
import org.jline.reader.ParsedLine;

/** Completer for Ignite SQL commands. */
public class IgniteSqlCommandCompleter implements Completer {
    @Override
    public void complete(LineReader reader, ParsedLine line, List<Candidate> candidates) {
        if (line.line().startsWith("help")) {
            String args = line.words()
                    .stream()
                    .skip(1)
                    .collect(Collectors.joining(" "));
            Arrays.stream(IgniteSqlCommand.values())
                    .map(IgniteSqlCommand::getTopic)
                    .filter(topic -> topic.startsWith(args))
                    .map(Candidate::new)
                    .forEach(candidates::add);
        }
    }
}
